Chimney-hood.



A SCHULER.

CHIMNEY HOOD.

APPLICATION man JULY 31.1915.'

Patented May 2, 1916.

INVENTOR ATTORNELJ.

.rnvirnn eras er ora ion.

ANTON SCHULER, OF NEW YORK, N. Y.

Application filed July 31, 1915.

To aZZ whom it may concern:

Be it known that I, ANTON SouULnn, a citizen of Switzerland, and a resident of New York city, in the county and State of New York, have invented certain new and useful Improvements in. Chimney-Hoods, of which the following is a specification.

This invention relates to a chimney hood of novel construction, which is composed of tiers of overlapping concrete blocks, that are thoroughly anchored, permit free ventilation and effectively exclude rain.

In the accompanying drawing: Figure 1 is a plan of a chimney hood embodying my invention; Fig. 2 a vertical cross section thereof; Fig. 3 a perspective view of one of the blocks; Fig. 4: a perspective view showing two overlapping blocks; F ig. 5 a perspective view of the key; Fig. 6 a plan of part of a modification of the hood, and Fig. 7 a similar view of a further modification.

Briefly stated, the hood is formed of a plurality of concrete blocks, arranged in tiers, the blocks of any one tier being partly overlapped by the blocks of the superimposed tier in such a manner, that inclined draft openings are formed between the overlapping portions of the blocks.

As more fully shown in Fig. 8, each block is composed of a web 1 which is inclined outwardlv from top to bottom. and is preferably of concavo-convex form in cross section. From each end of web 1, there extends inwardly a flange 2, the two flanges being of substantially triangular shape and joining the web at an obtuse angle, so that the flanges diverge from top to bottom. From the outer face of each flange, there extends a foot or lobe 3, the height of which is considerably less than that of the web. Each foot projects outwardly to the lower or outer edge of the web, while the inner face of the foot is beveled as at 4. and is provided with an upright key groove 5. The block formed as described may be suitably reinforced by rods 6 embedded therein, and indicated by dotted lines in Fig. l.

In assembling the parts, a lower tier of four blocks is mounted in a square upon the chimney shaft so that the beveled faces 4: of adjoining blocks abut. The second tier of blocks is now mounted upon the first tier. by resting the feet 3 of such second tier upon the corresponding feet of the first tier, and causing the upper portions of the lower tier flanges 2 to be straddled by the lower por- Specification of Letters Patent.

CHIMNEY-HOOD.

Patented May 2, 1916.

Serial No. 42,869.

tions of the upper tier flanges (Fig. 4) such straddling being feasible for the reason that by the diverging arrangement of the flanges. their clearance is less at the top than at the bottom. When the blocks have been properly assembled in the manner described, the beveled faces 4 of the superposed blocks will become alined with each other and abut against the beveled faces of the two adjoin 111g blocks. In this way the key grooves 5 of such adjoining blocks will form an upright channel into which is fitted a correspondingly shaped concrete key 7, which extends from the center of the lower tier to the center of the upper tier, so that in this way, the blocks become firmly locked against lateral or vertical displacement. In order to support key 7, a key-half should be fitted below the same into each channel of the bottom tier.

After the second tier has been laid in the manner described. the third tier is added. and in this way, the operation is continued until the hood has reached the desired height, a key half being also inserted into the channels of the top tier.

With the construction described. the upper portion of the web of any one block, will be overlapped by the lower portion of the web of the superimposed block, while, owing to the inclined position of the webs, they will be so spaced as to form between them,

a long and narrow air opening which extends downwardly and outwardly, and thus establishes a communication between the interior of the hood and the atmosphere. Through the several openings that are thus formed on all sides of the hood, a flow of air will be induced that prevents down drafts. expels top gases, and aids in ventilation.

The hood is of great strength, may be readily constructed owing to the uniformity of its units, and presents no sharp angles to the inflowing air.

In Fig. 6. is shown part of a hood, in which each side is formed of two blocks. In this case. the outer foot 3 of each block retains its beveled face, while its inner foot is provided with a square end 8, that abuts quarely against the foot of the adjoining block.

In Fig. 7 is shown part of a round hood. in which the web of each block is arched as at 9, in conformity with the curvature of the chimney shaft.

These two modifications represent but a few examples of construction to which the invention is applicable, it being of course, possible to adapt the invention to hoods of 5 any other size and configuration.

I claim: 1. A chimney hood comprising tiers of blocks having inclined overlapping webs,

blocks, having inclined overlapping webs,

flanges projecting inwardly from the ends of the webs, lobes extending outwardly from Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents.

the lower portions of the flanges, the lobes of any one tier supporting the corresponding lobes of the superimposed tier, and means for interlocking alined lobes.

3. A chimney hood comprising tiers of blocks, having inclined overlapping webs, triangular flanges projecting inwardly from the ends of the webs, grooved lobes formed on the lower portions of the flanges and extending outwardly to the lower outer edges of the webs, the lobes of any one tier supporting the corresponding lobes of the super-imposed tier, and keys engaging the grooves of adjoining blocks and also of superimposed blocks.

ANTON SCHULER.

Washington, D. G. 

